PopularMoviesFragment.kt

adapter.addLoadStateListener { combinedLoadStates ->
    when (val loadState = combinedLoadStates.source.refresh) {
        is LoadState.NotLoading -> {
            popular_movies_refresh_layout.visible()
            popular_movies_progress.gone()
        }
        is LoadState.Loading -> {
            popular_movies_progress.visible()
            popular_movies_refresh_layout.gone()
        }
        is LoadState.Error -> {
            Timber.e(loadState.error.localizedMessage)
        }
    }
}